A logic error in LoginWindow in Apple Mac OS X 10.4 through 10.4.7, allows network accounts without GUIds to bypass service access controls and log into the system using loginwindow via unknown vectors.
lists.apple.com/archives/security-announce/2006/Sep/msg00002.html
secunia.com/advisories/22187
securitytracker.com/id?1016959
www.kb.cert.org/vuls/id/897628
www.osvdb.org/29272
www.securityfocus.com/bid/20271
www.us-cert.gov/cas/techalerts/TA06-275A.html
www.vupen.com/english/advisories/2006/3852
exchange.xforce.ibmcloud.com/vulnerabilities/29293